File:The Botanical magazine (1912) (19780744833).jpg

Title: The Botanical magazine
Identifier: botanicalmagazin26toky (find matches)
Year: 1887 (1880s)
Authors: Tokyo Shokubutsu Gakkai; Nihon Shokubutsu Gakkai
Subjects: Plants; Plants -- Japan
Publisher: Tokyo : Tokyo Botanical Society
Contributing Library: New York Botanical Garden, LuEsther T. Mertz Library
Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden

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238 THE BOTANICAL MAGAZINE. (Vol. XXVI. No. 308 near future, we are sure the disease will certainly be observed in the various localities of our country. The first indication of this disease is a small, pale yellow speck on the surface of the leaf, and we can see the darker net- ted lines in the tissue of the spot on the affected young leaf, when it is held up against the sun. The speck on a single leaf is variable in number, mostly one or two. It is not clearly limited in outline, irregular in shape, gradually enlarging until it reaches a diameter of 2 or 3 cm., but sometimes until it covers the entire leaf surface. The color of the speck gradual- ly turns into brown and finally into dark brown. The corres- ponding surface on the under side of the leaf assumes at first a gray, dusty appearance. As they mature, the darker reticulat- ed lines in the tissue are at first slightly raised above the level of the leaf-surface, and then by breaking through the epidermis, the characteristic white reticulated hymenium of the fungus is exposed. (Fig.1)
Text Appearing After Image:
The hymcnium turns gradually into dark brown color from the central portion toward the periphery of the speck. Finally, the affected area of the leaf becomes dry and shrinks up.

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